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Titolo:
Drying ability of anhydrous sodium sulfate on wet organic solvents after liquid-liquid partition
Autore:
Obana, H; Okihashi, M; Akutsu, K; Taguchi, S; Hori, S;
Indirizzi:
Osaka Prefectural Inst Publ Hlth, Higashinari Ku, Osaka 5370025, Japan Osaka Prefectural Inst Publ Hlth Osaka Japan 5370025 saka 5370025, Japan
Titolo Testata:
JOURNAL OF THE FOOD HYGIENIC SOCIETY OF JAPAN
fascicolo: 2, volume: 42, anno: 2001,
pagine: 148 - 153
SICI:
0015-6426(200104)42:2<148:DAOASS>2.0.ZU;2-B
Fonte:
ISI
Lingua:
JPN
Keywords:
solvent; water concentration; anhydrous sodium sulfate; dehydration; Karl Fischer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
3
Recensione:
Indirizzi per estratti:
Indirizzo: Obana, H Osaka Prefectural Inst Publ Hlth, Higashinari Ku, 1-3-69 Nakamichi, Osaka 5370025, Japan Osaka Prefectural Inst Publ Hlth 1-3-69 Nakamichi Osaka Japan 5370025
Citazione:
H. Obana et al., "Drying ability of anhydrous sodium sulfate on wet organic solvents after liquid-liquid partition", J FOOD HYG, 42(2), 2001, pp. 148-153

Abstract

Water concentration in organic solvents after liquid-liquid partition was determined by the Karl Fischer titration method. n-Hexane and petroleum ether showed quite low levels of water, such as 0.1 mg/mL. The water concentration in wet ethyl acetate was about 20 similar to 30 mg/mL and that in diethyl ether was about 8 similar to 10 mg/mL. Anhydrous sodium sulfate absorbed about 20 similar to 25% of the water after vigorous mixing with wet ethylacetate or diethyl ether. Wet acetonitrile extract from wet food, which contained about 60 mg/mL water after salting out with sodium chloride, was not dried at all with anhyfrous sodium sulfate treatment. Spiking n-hexane into wet ethyl acetate or wet diethyl ether was effective to exclude water. Spiking toluene into salted acetonitrile drove out water and dissolved sodium chloride. It can be concluded that the drying ability of anhydrous sodiumsulfate towards wet organic solvents is poor, but it is effective in removing suspended water in solvents.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/08/20 alle ore 08:03:49